Kinetic Study Of Ozone Catalytic Decomposition And Preparation Of The Fiberglass Catalyst

Ozone is an important gas both in upper and ground-level atmosphere. The ozone sphere adsorbs most of the short wave ultra-violet which is deadly to most of life on earth and is the protective umbrella of earth. However the ground-level ozone is a serious pollutant, which results in crop production decrease and animal disease. The limit is 0.2mg/m3 in the atmospheric quality standards of our country.In ozone purification, active carbon adsorption and thermal catalytic decomposition are the common methods. Active carbon adsorption is the most commonly used method in gas pollution purification, but usually not used only to remove ozone in buildings. The noble metal and transition metal oxides are both used in ozone thermal catalytic decomposition.This study investigates ozone catalytic decomposition on transition metal oxides(CuO/MnO2). The experiments were conducted in an air cleaning media test system, in which the temperature, humidity and the amounts of ozone could be controlled. And in this study, the effects of relative humidity, temperature and ozone concentration was investigated. The effects of relative humidity experiments were conducted at two ozone concentrations, 300 ppb and 1100 ppb. The effects of ozone concentration(200-2000ppb) experiments were conducted at the temperature range of 30-160? and the data of 40?, 70?, 100? and 130? was chosen to fit the reaction process model. Besides, catalytic materials were prepared by impregnation method with the CuO/MnO2 loaded on the fiberglass. 27 kinds of material were prepared.We have had the following findings: 1) the ozone decomposition efficiency is 50-60% in the typical indoor environment; 2) the relative humidity has little effects on ozone decomposition by CuO/MnO2; 3) the ozone decomposition is an approximate first ordered reaction; 4) the best preparation condition of glass fibers supported CuO/MnO2 catalyst is: the hydrochloric acid is 1%, the Cu: Mn=1: 3, the dry temperature is 70?, and the best roast temperature is 200?.